Does Findster Duo fit in my pet’s collar? Jane Jonson Updated January 13, 2017 15:41 Follow Yes, Findster Duo has a clip you could easily attach to your pet’s collar. Related articles 7. Attaching Pet module 🎥 How do I update the modules Firmware? 🎥 What is the Guardian and Pet module’s battery life? Is Findster Duo safe for my pet? What’s the difference between a Guardian and a Pet module? Have more questions? Submit a Request Comments 0 comments Please sign in to leave a comment.